Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 1620269 times)

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Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34850 on: July 15, 2019, 07:31:03 pm »
You will convert or die. This is the RPN inquisition!  :-DD
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34851 on: July 15, 2019, 07:45:33 pm »
You will convert or die. This is the RPN inquisition!  :-DD

No I won't. I now have a Fluke 7260A coming my way due to the good graces of nixiefreqq. I'm easily bought.  :-DD :-DD

Seriously...I don't know how to thank him enough.  :-+

And in other news......Wednesday I go to check out a Tek 485 and a Type 191. It's raining TEA all over me.  :P ;D ;D
An old gray beard with an attitude.
 

Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34852 on: July 15, 2019, 08:12:27 pm »
 :-DD ... it looks like a star trek shuttle that thing

When you receive the 191, eviscerate it from the chassis, then observe it approvingly. Don't need to fire it up to appreciate that bit of engineering. (unless it had a rat living in it at which point, throw it away )

Edit: also watch your fingers. The DC amp driver transistor is floating at 300V  :scared:
« Last Edit: July 15, 2019, 08:26:52 pm by bd139 »
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34853 on: July 15, 2019, 08:39:54 pm »
The 7260A does indeed look like it's ready to take off.  :-DD

TekWiki has pictures of the Type 191 internals. Absolutely beautiful construction.  :-+
An old gray beard with an attitude.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34854 on: July 15, 2019, 08:44:17 pm »
do it!  do it!

my only condition is that you must take my side (the equal sign side) in the rpn wars.

You drive a hard bargain. Of course I'll agree. ==========  :-DD

PM coming at you.  ;D

fantastic.   now there are two of us in the algebraic army.

oculus and bd had better be careful about poking us with a stick. 
I hear them right now shoving their sticks into the pencil sharpener even as I write this reply  :-DD
Who let Murphy in?
 

Offline nixiefreqq

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34855 on: July 15, 2019, 08:46:10 pm »
hey med   (aka ff)

just got back from post office.

check pm in about 10 minutes for your tracking code.

ps   ff = fluke freq
"free range primate"
 
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Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34856 on: July 15, 2019, 08:48:09 pm »
I hear them right now shoving their sticks into the pencil sharpener even as I write this reply  :-DD

We don't have pencils because we don't have to write our intermediate calculations down  :-DD
 
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Offline nixiefreqq

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34857 on: July 15, 2019, 09:00:41 pm »
I hear them right now shoving their sticks into the pencil sharpener even as I write this reply  :-DD

We don't have pencils because we don't have to write our intermediate calculations down  :-DD

careful.....careful.

you can probably take me......no sweat.

you might even be able to whoop med's retired greybeard.

but his young lady can for sure drop you like a sack of dirty laundry.
"free range primate"
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34858 on: July 15, 2019, 09:03:35 pm »
I hear them right now shoving their sticks into the pencil sharpener even as I write this reply  :-DD

We don't have pencils because we don't have to write our intermediate calculations down  :-DD
Neither do the = key brigade because we have a memory for that and sometimes we have 10 or more such memories  :-DD
Who let Murphy in?
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34859 on: July 15, 2019, 09:04:41 pm »
I hear them right now shoving their sticks into the pencil sharpener even as I write this reply  :-DD

We don't have pencils because we don't have to write our intermediate calculations down  :-DD

careful.....careful.

you can probably take me......no sweat.

you might even be able to whoop med's retired greybeard.

but his young lady can for sure drop you like a sack of dirty laundry.
That had me chortling like a good un  :-DD
Who let Murphy in?
 

Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34860 on: July 15, 2019, 09:08:42 pm »
The 7260A does indeed look like it's ready to take off.  :-DD

TekWiki has pictures of the Type 191 internals. Absolutely beautiful construction.  :-+

Not as nice, IMNSHO, as the Tek 184. Yes I have both.

FFI, see the tek wiki or https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg2196288/#msg2196288
« Last Edit: July 15, 2019, 09:11:39 pm by tggzzz »
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
Having fun doing more, with less
 

Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34861 on: July 15, 2019, 09:15:13 pm »
I hear them right now shoving their sticks into the pencil sharpener even as I write this reply  :-DD

We don't have pencils because we don't have to write our intermediate calculations down  :-DD
Neither do the = key brigade because we have a memory for that and sometimes we have 10 or more such memories  :-DD

And still they forget they can't predict what result a particular calculator will give to "1+2*3=", without trying it. "Operational semantics" is a dirty concept, no different to "try it and see".

Or, for that matter, that some calculators are half RPN, e.g. to calculate sin(0.1) you have to enter "0.1 sin" :)
« Last Edit: July 15, 2019, 09:17:53 pm by tggzzz »
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
Having fun doing more, with less
 

Offline nixiefreqq

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34862 on: July 15, 2019, 09:17:33 pm »
swmbo saw a piece of TE come out of the basement and depart in a mailing box.

SHE IS NOW TAKING ME OUT FOR ICE CREAM!

now that is what we call a win win result.
"free range primate"
 
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Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34863 on: July 15, 2019, 09:18:48 pm »
Welp... aside from a ASUS AC1700 router for $59.99, nothing else juicing my 'nads on Prime Day or Anti-Prime Day sales.

LOTS of combos for 450 Chipset boards with 1st/2nd Gen Ryzen though; everybody's using "Prime Day" as an excuse to dump their last-gen crap and trying to get as much out of 2xxx processors as the similarly benchmarked 3xx processors, almost to the dollar.  :palm:

In the end I bought the MB I wanted at full price; I'll put the Ryzen 3xxx processors I want up on my birthday wish lists and notify those who give a damn about me surviving to see another year. If no "happy surprises", I'll buy whatever I can afford with B-day monies later.  :o

Now just casually noodling around for random goodies while my body catches up from staying up til 6am then up again at 11:00.

mnem
mrrp?
 

Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34864 on: July 15, 2019, 09:30:38 pm »
swmbo saw a piece of TE come out of the basement and depart in a mailing box.

SHE IS NOW TAKING ME OUT FOR ICE CREAM!

now that is what we call a win win result.

I think that's her attempt at behavior modification therapy  :-DD
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34865 on: July 15, 2019, 09:42:31 pm »
I hear them right now shoving their sticks into the pencil sharpener even as I write this reply  :-DD

We don't have pencils because we don't have to write our intermediate calculations down  :-DD
Neither do the = key brigade because we have a memory for that and sometimes we have 10 or more such memories  :-DD

And still they forget they can't predict what result a particular calculator will give to "1+2*3=", without trying it. "Operational semantics" is a dirty concept, no different to "try it and see".

Or, for that matter, that some calculators are half RPN, e.g. to calculate sin(0.1) you have to enter "0.1 sin" :)
Now the answer to these questions lie in what type of calculator you use, Texas Ti68 and 85 get it right and my Huawei smart phone gets it even without having to press the = button and it displays the problem at the same time, pressing the = just removes the problem and leaves the answer
Who let Murphy in?
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34866 on: July 15, 2019, 09:44:09 pm »
I hear them right now shoving their sticks into the pencil sharpener even as I write this reply  :-DD

We don't have pencils because we don't have to write our intermediate calculations down  :-DD

careful.....careful.

you can probably take me......no sweat.

you might even be able to whoop med's retired greybeard.

but his young lady can for sure drop you like a sack of dirty laundry.

 :-DD :-DD :-DD :-DD :-DD
An old gray beard with an attitude.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34867 on: July 15, 2019, 09:48:00 pm »
Welp... aside from a ASUS AC1700 router for $59.99, nothing else juicing my 'nads on Prime Day or Anti-Prime Day sales.

LOTS of combos for 450 Chipset boards with 1st/2nd Gen Ryzen though; everybody's using "Prime Day" as an excuse to dump their last-gen crap and trying to get as much out of 2xxx processors as the similarly benchmarked 3xx processors, almost to the dollar.  :palm:

In the end I bought the MB I wanted at full price; I'll put the Ryzen 3xxx processors I want up on my birthday wish lists and notify those who give a damn about me surviving to see another year. If no "happy surprises", I'll buy whatever I can afford with B-day monies later.  :o

Now just casually noodling around for random goodies while my body catches up from staying up til 6am then up again at 11:00.

mnem
mrrp?
I'm not falling for prime day, its a right old load of crap, unless you happen to be looking for something, which I'm not.
Who let Murphy in?
 

Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34868 on: July 15, 2019, 10:07:24 pm »
I hear them right now shoving their sticks into the pencil sharpener even as I write this reply  :-DD

We don't have pencils because we don't have to write our intermediate calculations down  :-DD
Neither do the = key brigade because we have a memory for that and sometimes we have 10 or more such memories  :-DD

And still they forget they can't predict what result a particular calculator will give to "1+2*3=", without trying it. "Operational semantics" is a dirty concept, no different to "try it and see".

Or, for that matter, that some calculators are half RPN, e.g. to calculate sin(0.1) you have to enter "0.1 sin" :)
Now the answer to these questions lie in what type of calculator you use, Texas Ti68 and 85 get it right and my Huawei smart phone gets it even without having to press the = button and it displays the problem at the same time, pressing the = just removes the problem and leaves the answer

As I said, suck it and see :( and then forget what this calculator happens to do.

But you know all RPN calculators behave the same unambiguous way - highly preferable.
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
Having fun doing more, with less
 

Offline Neomys Sapiens

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34869 on: July 15, 2019, 10:59:18 pm »
Today I was looking for a book and found in a box these nice ones:


So? How many volumes of the Telefunken Laborbuch?
 

Offline Kosmic

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34870 on: July 15, 2019, 11:01:54 pm »
swmbo saw a piece of TE come out of the basement and depart in a mailing box.

SHE IS NOW TAKING ME OUT FOR ICE CREAM!

now that is what we call a win win result.

Well I had the reverse problem this weekend Swmbo went to the basement when I was not there. I'm now diagnosed with hoarding disorder apparently. To my defense, I told her I don't have 2 of the same unit  :-DD
« Last Edit: July 15, 2019, 11:16:35 pm by Kosmic »
 

Offline nixiefreqq

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34871 on: July 15, 2019, 11:02:19 pm »
swmbo saw a piece of TE come out of the basement and depart in a mailing box.

SHE IS NOW TAKING ME OUT FOR ICE CREAM!

now that is what we call a win win result.

I think that's her attempt at behavior modification therapy  :-DD

so you are comparing me to a rat in a Skinner box?

was going to argue.  but instead have an irresistible compulsion to head for the basement and look for more TE that is excess to my needs.



ps  swmbo's reward for me was a single scoop of "graham cracker" in a waffle cone.  devious little english woman she is.

pps  hope she does not remember that behavior can also be altered with positive punishment.
"free range primate"
 
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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34872 on: July 15, 2019, 11:37:27 pm »
swmbo saw a piece of TE come out of the basement and depart in a mailing box.

SHE IS NOW TAKING ME OUT FOR ICE CREAM!

now that is what we call a win win result.

Well I had the reverse problem this weekend Swmbo went to the basement when I was not there. I'm now diagnosed with hoarding disorder apparently. To my defense, I told her I don't have 2 of the same unit  :-DD

You need to put a lock on the basement door. Although that might raise all kinds of suspicions.  :palm: No...forget that idea.  :-DD
An old gray beard with an attitude.
 
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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34873 on: July 15, 2019, 11:46:10 pm »
Continuing work on the Heath S-3 Electronic Switch. This time the bottom side. The flying ground lead/point-to-point wiring scheme is for the birds but that was a common technique prior to the 1960's and before more common use of circuit boards. It's what i have to work with so I'll make do. Discovered I'm short one capacitor. Should have ordered 3 - 0.047uf/400V but only have 2. Oh well. Catch it in the next parts order.

I wanted to get this done today but there were too many (happy) distractions. So I'll complete it tomorrow. No biggie, I'm retired, got all the time in the world.  :-+

   
An old gray beard with an attitude.
 
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Offline 0culus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #34874 on: July 16, 2019, 01:21:40 am »
Just a small tweak to that explanation. Rather than the year of manufacture, it's the year of the design. It could have been manufactured that year or sometime thereafter. Some models had multiple design iterations, while others were manufactured for many years using the same design.
Are you sure? I've always heard that the first two digits are the year it was made, in years since 1960. Never heard of it denoting design iterations.  :-//

That was my initial understanding too, but further digging into them a while back clarified things a bit. Beginning in 1960, they started using a three digit prefix (which became four digits in 1970), followed by a letter indicating country of origin (A for the US, J for Japan, G for Germany, etc.), then a sequential serial number.

The prefix identifies the release date of the major engineering revision that the instrument is built to - the first one (or two, for the four digit prefixes after 1970) digits added to 1960 will give the year, and the last two are the week. Eg. 710 would be the tenth week of 1967; 2245 would be the 45th week of 1982. To more accurately date the 'birthday' of the unit, you'd need to go inside and find parts with date codes. While they wouldn't tell you with 100% accuracy how new it was, you could be sure it was not older than its newest part (this of course is based on the part in question being original to the instrument).

Some instruments were revised fairly quickly and the engineering rev dates track their production closely; others stayed the same for a long time. For instance, I have an Agilent labeled 8644B signal generator that has a 3546 prefix - late 1995 engineering revision. The component dates indicate that it was made in late 2000 at the earliest.

-Pat

Can you provide a source? I'd like to learn more. I've found some old old discussions talking about how the second two digits are production run numbers, but not much agreement about the meaning of the first two digits. Some say it's the exact year of production, others agree with you. Not saying you're wrong, but I'd like to see a definitive source on this.  :-+
 


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